Memory retrieval before or after extinction reduces recovery of fear in adolescent rats

A retrieval trial before extinction reduced renewal regardless of whether the retrieval was presented in the training context (group Retrieval A) or the extinction context (group Retrieval B). Rats were in one of three groups: No Retrieval (n = 14), Retrieval (A) (n = 12), Retrieval (B) (n = 14). (A) Mean (±SEM) levels of CS-elicited freezing for retrieval–extinction in Experiment 2. (B) Mean (±SEM) levels of CS-elicited freezing at test in the extinction context B and the training context A in Experiment 2.